Prove that: tan8theta-tan5theta-tan3theta=tan8theta.tan5theta.tan3theta
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Answer:
tan8theta=tan(5theta-tan3theta) tan8theta=tan5theta-tan3theta÷1+tan5thetatan3theta
By doing cross multiply
tan8theta×(1+tan5theta3theta)=tan5theta-tan3theta
Step-by-step explanation:
tan8theta+tan8theta×tan5theta×tan3theta=tan5theta-tan3theta. tan8theta×tan5theta×tan3theta=tan5theta-tan3theta-tan8theta
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