exam Maths Puzzle Numerical Ability

(�7 sqrt sign 11 - sqrt sign7)(sqrt sign 7 � 10 sqrt sign 11)

simplify

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exam Other Question

Evaluate:

14a/b for a=10 and b=2

HELP If,
sec@=sec$sec*+tan$tan*
Then Prove That:
sec$=sec*sec@+tan*tan@
sec*=sec@sec$+tan@tan$