Use an identity to simplify the following expression. tan 9° 1 - tan?9° Choose the correct...
can someone solve this? Write the expression in terms of sine and cosine, and then simplify so that no quotients appear in the final expression. sin? (1 - csc2 e) Choose the correct answer below. OB. sin e OA. 1 sin? O C. tan? 0 O E. cos? OD. cote OF. - cos?
This Question: 5 pts 9 of 20 (12 complete) Use identities to find values of the sine and cosine functions for the angle measure. 0, given that cos20 = 656 and o®<o<90° sino = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression Rationalize all denominators.) cos8= (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression Rationalize all denominators.) This Question: 5 pts 10 of 20...
Use a half-angle identity to find the exact value of the following expression. tan 15° Which of the following is the correct value of tan 15°? O A. -2-13 OB. -2+ V3 O C. 2+ 3 OD. 2-13
Use a half-angle identity to find the exact value of the following expression. tan 112.5° Which of the following is the correct value of tan 112.5°? OA. -1+ V3 OB. -1-12 O c. 1-2 OD. 1+12
Write the expression as a single function of a. cos (90° - a) Choose the correct function for cos (90° - «). O A. cos a OB. - sin a O c. sin a OD - COS a
This Question: 3 pts 4 of 10 (1 complete) Prove the identity 1 + cos 90 cos 38+ sin 9e sin 38 = 2 cos (38) Notice that the left side of the identity contains two products of trigonometric functions. Rewrite these products using the product to sum identities. Choose the correct answ OA 13(cos 68 + cos 128) + (cos 68 - cos 128) OB. 1 (sin 68 - ein 120) • (ain 88 + sin 128) OC. 1...
Verify that the equation is an identity. sin x cOS X secx + = sec?x-tan? CSC X Both sides of this identity look similarly complex. To verify the identity, start with the left side and simplify it. Then work with the right side and try to simplify it to the same result. Choose the correct transformations and transform the expression at each step COS X sin x secx CSC X The left-hand side is simplified enough now, so start working...
Ein the identity. sin(a+B) = tan a cot +1 cos a sin B Choose the sequence of steps below that verifies the identity. O A. sin (a +B) cos a sin cos acos B+ sin a sin cos a sin B cos acos B cos a sin B + sin a sin cos a sin = tan a cot B+1 sin a cos B+ cos a sin B cos a sin sin a cos p cos a sin + cos...
A. Use a double-angia idensty to find the exact value of the expnesson 1-tan Choose the corroct answor balow O B. 0 OC. 1 D, B. Write the expression as a product of trigonometric functions. cos 10x-cos 8x -D cos 10x-cos 8x = sin 7a+ sin 2 Chcose the correct answer below OB. 2 sin 2sin
Simplify the expression by using an appropriate identity. Do not use a calculator. (cos72)(cos 18°) - (sin 72°)(sin18°) (cos72°)(cos18°) - (sin 72°)(sin 18°)=