Question

if cos theta + sec theta is equal to 17 calculate the value of cos square theta + sec square theta​

Answer 1

Answer:

287

Step-by-step explanation:

cos theta + sec theta = 17

squaring both sides, we get

(cos theta+sec theta)²= 289

cos²theta+ sec² theta+ 2cos theta sec theta = 289

cos²theta+ sec² theta+2cos theta ×1÷cos theta = 289

cos theta and cos theta cancels out

cos²theta+ sec² theta= 289- 2

cos²theta + sec² theta = 287