if 2 (cos+sec)=5,what is value of cos square+sec square
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cos + sec = 5/2
(cos + sec )^2 = 25/4
cos sq + sec sq + 2cos sec = 25/4
cos sq + sec sq + 2 cos ( 1/ cos) = 25/4
cos sq + sec sq + 2 = 25/4
cos sq + sec sq = 25/4 - 2
= (25-8)/4
= 18/4 = 9/2
the answer is 9/2 or 4.5
(cos + sec )^2 = 25/4
cos sq + sec sq + 2cos sec = 25/4
cos sq + sec sq + 2 cos ( 1/ cos) = 25/4
cos sq + sec sq + 2 = 25/4
cos sq + sec sq = 25/4 - 2
= (25-8)/4
= 18/4 = 9/2
the answer is 9/2 or 4.5
anjani9:
it was 85 percent correct
how its 15 percent wrong
then whats the answer
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