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Joanna
Mathematics
23 May, 08:14
What is the answer of
7 cot^2 - 7 cosec^2 = ?
+2
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1
)
Jovanni Hamilton
23 May, 08:23
0
-7.
Step-by-step explanation:
Using the identity cosec^2 x = 1 + cot^2 x we have
7 cot^2 x - 7 (1 + cot^2 x)
= 7 cot^2 x - 7 - 7cot^2 x
= - 7.
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