48. Given that a + B = 90°, show that
cosacosecß – cosasinB = sina
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Answer:
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Step-by-step explanation:
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Answer:
follow the following method
it will help you
Step-by-step explanation:
a+B=90⁰
then B=90⁰-a
then cosacosecB-cosasinB
=cosacosec(90⁰-a)-cosasin(90⁰-a)
=cosa.seca-cosa.cosa
=1-cos²a
=sin²a
Hence, (cosa.cosecB-cosa.sinB)^(1/2) = sina
(Proved)
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